Browner and Easley joined defensive back Nate Ebner and offensive lineman Cameron Fleming, who both missed their second day of practice on Thursday as the Pats prepare for Sunday’s game against the Bills in Buffalo.

Browner reportedly suffered an ankle injury that kept him out of Thursday’s session. He was a full participant on Wednesday, but Thursday’s absence puts his availability for Sunday’s game in doubt. Browner returned from a four-game suspension last week, but did not play in New England’s win over the Cincinnati Bengals on Sunday night.

Easley was limited in Wednesday’s walk-through, but did not participate in Thursday’s full practice.

Center Bryan Stork also suffered a head injury in Thursday’s practice that limited him for the rest of the day. The rookie has started the last two games at center for New England, helping solidify a shaky offensive line.

Here is Thursday’s full practice participation report from the Patriots:

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